Removing the first 16 bytes from a byte array

See Arrays class in the Java library:

Arrays.copyOfRange(byte[] original, int from, int to)

from is inclusive, whereas to is exclusive. Both are zero based indices, so to remove the first 16 bytes do

Arrays.copyOfRange(original, 16, original.length);

byte[] a;

...

if(a.length > 1) {
    byte[] newA = new byte[a.length-2];
    for(int i = 2; i < a.length; ++i)
        newA[i-2]=a[i];
}